didn't know where to report this, it might be something useful - got this when I logged in to the main site ( not the forums ):

user warning: Duplicate entry 'drupalvb' for key 2 query: INSERT INTO authmap (authname, uid, module) VALUES ('drupalvb', 162, 'module') in <path>/includes/database.mysql.inc on line 120.
I've omitted the <path> part since it might be misused - I guess the guy(s) responsible will know just fine where their files are anyway